Welding technology has been widely applied in the oil industry and played an increasingly important role. For coiled tubing drilling, the weakest of the bottom hole assembly (BHA) that is dangerous section of the welds. In recent years, ...

Large diameter thick wall straight seam double submerged arc welding pipe welding technology invented back in 1940, a new welding method. It is the same place, and manual welding or the use of slag to protect it, but this is not a slag ...